No outrage is warranted in any case.
It's not that it was warranted or not, it's that Inafune gave us a lack of communication that upset people when something that would have informed an earlier decision was dropped on them. Igarashi was forward and direct about his business strategy from his game BEFORE we gave him any money and so people don't feel like someone put one over on them to get them to give them money.
Red Ash, for instance, did not address the current state of Mighty Number 9 in full, and it did not address the backing the project already had in the works. Mighty Number 9 just kept changing coarse and started doing things that weren't in the initial request for cash that rubbed people the wrong way.
If you rub someone too much they're likely to snap. Whether it's warranted or not isn't a reality of the situation, as you can't control masses of people. Morality goes right out the window and emotion takes the reigns. You have to understand general sentiment to make smart decisions on this level, and Inafune didn't. Igarashi's success is likely due to the partnership he had with Ben Judd and the guidance that offered him.
(I believe MN9's first funding had a similar partnership for their kickstarter if I remember correctly, which may be why that first campaign succeeded where Inafune's later 2 failed.)
